Skip to main content
An official website of the United States government
Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

A-101 topical solution

A proprietary topical formulation consisting of a high-concentration of hydrogen peroxide (H2O2), with potential keratolytic activity. Upon administration of the A-101 topical solution to an affected area of skin, the hydrogen peroxide penetrates into the cells, increases oxygen content, produces reactive oxygen species (ROS), causes oxidative stress and induces apoptosis through oxidative damage. This may clear the affected skin cells and remove common warts (verruca vulgaris) or seborrheic keratosis (SK).
Synonym:A-101 solution
Code name:A-101
Search NCI's Drug Dictionary